Frist Observation of Xi_c⁰ decays to pK^-K^-pi⁺

AUTHORS

Basit Athar (bsa@mail.lns.cornell.edu) ( bsa@mail.lns.cornell.edu )

John Yelton (yelton@phys.ufl.edu) ( yelton@phys.ufl.edu )

COMMITTEE

Steven Blusk (chair) (sblusk@physics.syr.edu)

Ahren Sadof (ajs@mail.lns.cornell.edu)

Feng Liu (feng@mail.lns.cornell.edu)

Abstract

We use CLEOIII data to make the first measurement of the exclusive decay of the \cascz\ to \p\kmi\kmi\pip\ 
final state. In \cleoiiv\, particle identification was not sufficient to obtain good signal to background
ratio in this mode. The new RICH (Ring Imaging CHerenkov) particle identification, combined with the energy
loss (de/dx) measurements, has dramatically improved the signal significance. In the following analysis, we
have measured the decay rate relative to the normalizing mode \cascz\decays\casmi\pip\, to be 0.31$\pm$0.07
($stat.$)$\pm$0.03($syst.$) for \cascz\decays\p\kmi\kmi\pip\ and $0.26\pm0.06(stat.)\pm0.02(syst.)$ for the
resonant substructure mode \cascz\decays\p\kmi${\bar K}^*(892)^0$.

• Thu, 13 Mar 2003 comments from Steven Blusk. Fri, 14 Mar 2003 Reply from authors
• Thu, 14 Mar 2003 comments from Steven Blusk. Fri, 16 Mar 2003 Reply from authors
• Thu, 16 Mar 2003 comments from Feng Liu. Fri, 17 Mar 2003 Reply from authors
• Thu, 16 Mar 2003 comments from CLEOAC. Fri, 17 Mar 2003 Reply from authors